Interest rates experienced a volatile first quarter that included the CBOE 10 Year Treasury Note Yield TNX 1.93 percent trading as low as 1.65 percent and as high as 2.25 percent.

Much of this split price action can be tied to economists and market watchers’ uncertainty over the timing of a Federal Reserve rate hike. Nevertheless, this volatility did not stop ETF investors from pouring into corporate bonds at a breakneck pace over the last three months.